Q. 21 In order of increasing percentage of silica, the correct sequence is
A. Sandy clay, calcareous clay, pure clay
B. Calcareous clay, pure clay, sandy clay
C. Pure clay, sandy clay, calcareous clay
D. None of these
B. Calcareous clay, pure clay, sandy clay
Q. 22Which of the following timbers is suitable for making sports goods?
A. Mulberry
B. Sal
C. Mahogany
D. Deodar
A. Mulberry
Q. 23 The stones obtained by blasting are used as
A. Aggregates for concrete
B. Road metal
C. Ballast in railways
D. All the above
D. All the above
Q. 24 Pick up the correct statement from the following:
A. Attrition test is done to find out the rate of wear of stones which are used in road construction
B. Crushing test is done to find out the compressive strength of the stone
C. Acid test is done to find out the weathering quality of stones
D. All the above
D. All the above
Q. 25 Mastic asphalt is
A. Fire proof
B. Elastic
C. Water proof
D. All the above
D. All the above
Q. 26 Pick up the correct statement from the following:
A. Lime is available by dissolving calcium carbonate in water
B. Lime is available by calcining calcium carbonate at 900°C
C. Lime is available in Free State
D. Lime is nothing but calcium chloride
B. Lime is available by calcining calcium carbonate at 900°C
Q. 27 The frog of the brick in a brick masonry is generally kept on
A. Top face
B. Longer side
C. Bottom face
D. Shorter side
A. Top face
Q. 28 Pick up the correct statement from the following:
A. Impurities float on the molten iron as slag
B. The slag contains lime about 45%
C. Roasting is not necessary if iron ore is an oxide
D. All the above
D. All the above
Q. 29 For obtaining vinyl chloride acetate, the method used, is
A. Condensation polymerization
B. Co-polymerization
C. Addition polymerization
D. None of these
D. None of these
30. Whitworth compressed steel is obtained when molten steel is subjected to a pressure of
A. 9 kg/mm2
B. 13 kg/mm2
C. 5 kg/mm2
D. 15 kg/mm2
A. 9 kg/mm2
